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The price of a seat on a flight, £P, is given by $$P = 49 \times 1.009^n$$ where n is the number of seats already sold on this flight - OCR - GCSE Maths - Question 16 - 2023 - Paper 6

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Question 16

The-price-of-a-seat-on-a-flight,-£P,-is-given-by--$$P-=-49-\times-1.009^n$$--where-n-is-the-number-of-seats-already-sold-on-this-flight-OCR-GCSE Maths-Question 16-2023-Paper 6.png

The price of a seat on a flight, £P, is given by $$P = 49 \times 1.009^n$$ where n is the number of seats already sold on this flight. (a) Write down the percenta... show full transcript

Worked Solution & Example Answer:The price of a seat on a flight, £P, is given by $$P = 49 \times 1.009^n$$ where n is the number of seats already sold on this flight - OCR - GCSE Maths - Question 16 - 2023 - Paper 6

Step 1

Write down the percentage increase in price of the second seat sold compared to the first seat sold.

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Answer

To calculate the percentage increase in price, we first need to find the price of the first and second seats.

  1. Price of the First Seat (n = 1):

    P1=49×1.0091=49×1.009=49.441P_1 = 49 \times 1.009^1 = 49 \times 1.009 = 49.441

  2. Price of the Second Seat (n = 2):

    P2=49×1.0092=49×1.018081=49.509P_2 = 49 \times 1.009^2 = 49 \times 1.018081 = 49.509

  3. Percentage Increase:

    The formula for percentage increase is:

    Percentage Increase=P2P1P1×100\text{Percentage Increase} = \frac{P_2 - P_1}{P_1} \times 100

    Substituting the values:

    Percentage Increase=49.50949.44149.441×1000.1378%\text{Percentage Increase} = \frac{49.509 - 49.441}{49.441} \times 100 \approx 0.1378 \%

Thus, the percentage increase in price of the second seat sold compared to the first seat sold is approximately 0.138%.

Step 2

Show that the price of the 40th seat sold is less than £70.

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Answer

To determine the price of the 40th seat:

  1. Price of the 40th Seat (n = 40):

    P40=49×1.00940P_{40} = 49 \times 1.009^{40}

    First, calculate 1.009401.009^{40}:

    1.009401.4323646541.009^{40} \approx 1.432364654

    Substituting this value:

    P40=49×1.43236465470.202P_{40} = 49 \times 1.432364654 \approx 70.202

However, since we want to show that the price of the 40th seat is less than £70, we need to reassess:

Since the calculations show the exceeding amount, we verify:

We need:

49×1.00940<7049 \times 1.009^{40} < 70

To validate:

1.00940<70491.4285714291.009^{40} < \frac{70}{49} \approx 1.428571429

However, finding the value of it did show exceeding the acceptable range instead, re-evaluating for a correct decreasing validation might yield a better result. Therefore, reclassifying results accounted might show a better representation as we observed.

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